JPH0412335B2 - - Google Patents

Info

Publication number
JPH0412335B2
JPH0412335B2 JP58240868A JP24086883A JPH0412335B2 JP H0412335 B2 JPH0412335 B2 JP H0412335B2 JP 58240868 A JP58240868 A JP 58240868A JP 24086883 A JP24086883 A JP 24086883A JP H0412335 B2 JPH0412335 B2 JP H0412335B2
Authority
JP
Japan
Prior art keywords
valve
directional
hydraulic pump
boom
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP58240868A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60133128A (ja
Inventor
Toichi Hirata
Seiji Tamura
Yoshio Kunitoki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP58240868A priority Critical patent/JPS60133128A/ja
Publication of JPS60133128A publication Critical patent/JPS60133128A/ja
Publication of JPH0412335B2 publication Critical patent/JPH0412335B2/ja
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
JP58240868A 1983-12-22 1983-12-22 油圧掘削機の油圧回路 Granted JPS60133128A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58240868A JPS60133128A (ja) 1983-12-22 1983-12-22 油圧掘削機の油圧回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58240868A JPS60133128A (ja) 1983-12-22 1983-12-22 油圧掘削機の油圧回路

Publications (2)

Publication Number Publication Date
JPS60133128A JPS60133128A (ja) 1985-07-16
JPH0412335B2 true JPH0412335B2 (fr) 1992-03-04

Family

ID=17065889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58240868A Granted JPS60133128A (ja) 1983-12-22 1983-12-22 油圧掘削機の油圧回路

Country Status (1)

Country Link
JP (1) JPS60133128A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002022969A1 (fr) * 2000-09-12 2002-03-21 Yanmar Co., Ltd. Circuit hydraulique de vehicule servant a realiser des operations d'excavation et de pivotement
EP2677210B1 (fr) * 2012-06-19 2016-04-20 Turner Powertrain Systems Limited Circuit hydraulique de boîte de vitesses
JP6723896B2 (ja) * 2016-10-25 2020-07-15 株式会社竹内製作所 油圧式走行装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370284A (en) * 1976-12-03 1978-06-22 Caterpillar Tractor Co Hydraulic device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5370284A (en) * 1976-12-03 1978-06-22 Caterpillar Tractor Co Hydraulic device

Also Published As

Publication number Publication date
JPS60133128A (ja) 1985-07-16

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term